7.27Volume,Treble,andBassSlewRatesRegister(0xD0)
7.28VolumeRegisters(0xD1–0xD9)
TAS5518C
8-ChannelDigitalAudioPWMProcessor
www.ti.com
SLES238A–SEPTEMBER2008–REVISEDJULY2009
Table7-31.VolumeGainUpdateRate(SlewRate)
D31–D10D9D8FUNCTION
000512stepupdateat4Fs,42.6msat48kHz
0011024stepupdateat4Fs,85.3msat48kHz
0102048stepupdateat4Fs,170msat48kHz
0112048stepupdateat4Fs,170msat48kHz
Table7-32.TrebleandBassGainStepSize(SlewRate)
D7D6D5D4D3D2D1D0FUNCTION
00000000Nooperation
00000100Minimumrate–Updatesevery0.083ms(everyLRCLKat48kHz)
00100000Updatesevery0.67ms(32LRCLKsat48kHz)
00111111Defaultrate-Updatesevery1.31ms(63LRCLKsat48kHz).Thisisthe
maximumconstanttimethatcanbesetforallsamplerates.
11111111Maximumrate–Updatesevery5.08ms(every255LRCLKsat48kHz)
Channels1,2,3,4,5,6,7,and8aremappedintoregisters0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,
and0xD8,respectively.Thedefaultvolumeforallchannelsis0dB.
Mastervolumeismappedintoregister0xD9.Thedefaultforthemastervolumeismute.
BitsD31–D12aredon'tcare.
Table7-33.VolumeRegisterFormat
D31D30D29D28D27D26D25D24FUNCTION
Unusedbits
D23D22D21D20D19D18D17D16FUNCTION
Unusedbits
D15D14D13D12D11D10D9D8FUNCTION
V11V10V9V8Volume
D7D6D5D4D3D2D1D0FUNCTION
V7V6V5V4V3V2V1V0Volume
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